diff --git a/apps/codecs/libmusepack/synth_filter_arm.S b/apps/codecs/libmusepack/synth_filter_arm.S
index 5bdae93561..b44e029a43 100644
--- a/apps/codecs/libmusepack/synth_filter_arm.S
+++ b/apps/codecs/libmusepack/synth_filter_arm.S
@@ -21,7 +21,12 @@
 
 #include "config.h"
 
+#if defined(CPU_S5L870X)
+    /* Moving this asm routine to iram is (little) faster on S5L870x. */
+    .section .icode, "ax", %progbits
+#else
     .section .text, "ax", %progbits
+#endif
 
 /****************************************************************************
  * void mpc_decoder_windowing_D(...)